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https://github.com/saymrwulf/pytorch.git
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8286ce1e3a
Summary: Closes https://github.com/caffe2/caffe2/pull/1260 Differential Revision: D5906739 Pulled By: Yangqing fbshipit-source-id: e482ba9ba60b5337d9165f28f7ec68d4518a0902
73 lines
2 KiB
C++
73 lines
2 KiB
C++
/**
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* Copyright (c) 2016-present, Facebook, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef CAFFE2_UTILS_THREADPOOL_H_
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#define CAFFE2_UTILS_THREADPOOL_H_
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#include "ThreadPoolCommon.h"
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#ifndef CAFFE2_THREADPOOL_MOBILE
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#error "mobile build state not defined"
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#endif
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// ThreadPool only used in mobile builds at the moment
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#if CAFFE2_THREADPOOL_MOBILE
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#include <memory>
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#include <mutex>
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#include <vector>
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//
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// A work-stealing threadpool loosely based off of pthreadpool
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//
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namespace caffe2 {
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class Task;
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class WorkersPool;
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constexpr size_t kCacheLineSize = 64;
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class alignas(kCacheLineSize) ThreadPool {
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public:
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// Constructs a work-stealing threadpool with the given number of
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// threads
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static std::unique_ptr<ThreadPool> defaultThreadPool();
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ThreadPool(int numThreads);
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~ThreadPool();
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// Returns the number of threads currently in use
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int getNumThreads() const;
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// Sets the minimum work size (range) for which to invoke the
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// threadpool; work sizes smaller than this will just be run on the
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// main (calling) thread
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void setMinWorkSize(size_t size);
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size_t getMinWorkSize() const { return minWorkSize_; }
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void run(const std::function<void(int, size_t)>& fn, size_t range);
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private:
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mutable std::mutex executionMutex_;
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size_t minWorkSize_;
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size_t numThreads_;
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std::shared_ptr<WorkersPool> workersPool_;
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std::vector<std::shared_ptr<Task>> tasks_;
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};
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} // namespace caffe2
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#endif // CAFFE2_THREADPOOL_MOBILE
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#endif // CAFFE2_UTILS_THREADPOOL_H_
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